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Finding the Fourth Proportional to 70,106.72, 96,745.96 and 39,891.36

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Solution

The fourth proportional to 70,106.72, 96,745.96 and 39,891.36 is: 55,049.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,106.72 : 96,745.96 = 39,891.36 : x
  2. Step 2: Convert to fraction form
    70,106.72/96,745.96 = 39,891.36/x
  3. Step 3: Cross multiply
    70,106.72x = 96,745.96 × 39,891.36
  4. Step 4: Simplify right side
    70,106.72x = 3,859,327,918.91
  5. Step 5: Solve for x
    x = 3,859,327,918.91/70,106.72
  6. Step 6: Final answer
    x = 55,049.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.